ZyXEL Communications NXC5200 User Manual page 544

Chapter 39 Troubleshooting
Cannot access the NXC from the LAN.
• Check the cable connection between the NXC and your computer or switch.
• Ping the NXC from a LAN computer. Make sure your computer's Ethernet card is
installed and functioning properly. Also make sure that its IP address is in the
same subnet as the NXC's.
• In the computer, click Start > Programs > Accessories and then Command
Prompt. In the Command Prompt window, type "ping" followed by the NXC's
LAN IP address (192.168.1.1 is the default) and then press [ENTER]. The NXC
should reply.
• If you've forgotten the NXC's password, use the RESET button. Press the button
in for about 5 seconds (or until the PWR LED starts to blink), then release it. It
returns the NXC to the factory defaults (password is 1234, LAN IP address
192.168.1.1 etc.; see your User's Guide for details).
• If you've forgotten the NXC's IP address, you can use the commands through
the console port to check it. Connect your computer to the CONSOLE port using
a console cable. Your computer should have a terminal emulation
communications program (such as HyperTerminal) set to VT100 terminal
emulation, no parity, 8 data bits, 1 stop bit, no flow control and 115200 bps port
speed.
I cannot access the Internet.
• Check the NXC's connection to the Ethernet jack with Internet access. Make
sure the Internet gateway device (such as a DSL modem) is working properly.
• If the NXC is operating in its default bridge mode, ensure that that the DHCP
that is connected to it is properly configured to assign IP addresses.
• Check the NXC's security settings and/or interface and VLAN settings to ensure
you have not inadvertantly excluded your client device from accessing the
network or the Internet.
I cannot update the anti-virus signatures.
• Make sure your NXC has the anti-virus service registered and that the license is
not expired. Purchase a new license if the license is expired.
• Make sure your NXC is connected to the Internet.
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NXC5200 User's Guide